101221001012 has 24 divisors (see below), whose sum is σ = 178852552704. Its totient is φ = 50121705312.

The previous prime is 101221000967. The next prime is 101221001051. The reversal of 101221001012 is 210100122101.

It is a junction number, because it is equal to n+sod(n) for n = 101221000984 and 101221001002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104093 + ... + 461819.

It is an arithmetic number, because the mean of its divisors is an integer number (7452189696).

Almost surely, 2^101221001012 is an apocalyptic number.

It is an amenable number.

101221001012 is a deficient number, since it is larger than the sum of its proper divisors (77631551692).

101221001012 is a wasteful number, since it uses less digits than its factorization.

101221001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358415 (or 358413 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101221001012 its reverse (210100122101), we get a palindrome (311321123113).

The spelling of 101221001012 in words is "one hundred one billion, two hundred twenty-one million, one thousand, twelve".