1221010220003 has 8 divisors (see below), whose sum is σ = 1398770661120. Its totient is φ = 1044082381320.

The previous prime is 1221010219921. The next prime is 1221010220063. The reversal of 1221010220003 is 3000220101221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221010220003 - 2¹⁸ = 1221009957859 is a prime.

It is a super-2 number, since 2×1221010220003² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221010220003.

It is not an unprimeable number, because it can be changed into a prime (1221010220063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208147463 + ... + 208153328.

It is an arithmetic number, because the mean of its divisors is an integer number (174846332640).

Almost surely, 2^{1221010220003} is an apocalyptic number.

1221010220003 is a deficient number, since it is larger than the sum of its proper divisors (177760441117).

1221010220003 is an equidigital number, since it uses as much as digits as its factorization.

1221010220003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416301217.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 1221010220003 its reverse (3000220101221), we get a palindrome (4221230321224).

The spelling of 1221010220003 in words is "one trillion, two hundred twenty-one billion, ten million, two hundred twenty thousand, three".