1021200120002 has 16 divisors (see below), whose sum is σ = 1542198362112. Its totient is φ = 507135112800.

The previous prime is 1021200120001. The next prime is 1021200120019. The reversal of 1021200120002 is 2000210021201.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1021200120001) 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, 1579958 + ... + 2130414.

It is an arithmetic number, because the mean of its divisors is an integer number (96387397632).

Almost surely, 2^{1021200120002} is an apocalyptic number.

1021200120002 is a deficient number, since it is larger than the sum of its proper divisors (520998242110).

1021200120002 is a wasteful number, since it uses less digits than its factorization.

1021200120002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556753.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1021200120002 its reverse (2000210021201), we get a palindrome (3021410141203).

The spelling of 1021200120002 in words is "one trillion, twenty-one billion, two hundred million, one hundred twenty thousand, two".