101221111121 has 16 divisors (see below), whose sum is σ = 110565740544. Its totient is φ = 92108487744.

The previous prime is 101221111111. The next prime is 101221111133. The reversal of 101221111121 is 121111122101.

It is not a de Polignac number, because 101221111121 - 2¹⁰ = 101221110097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101221111096 and 101221111105.

It is not an unprimeable number, because it can be changed into a prime (101221111111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63956 + ... + 454458.

It is an arithmetic number, because the mean of its divisors is an integer number (6910358784).

Almost surely, 2^101221111121 is an apocalyptic number.

It is an amenable number.

101221111121 is a deficient number, since it is larger than the sum of its proper divisors (9344629423).

101221111121 is a wasteful number, since it uses less digits than its factorization.

101221111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390800.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 101221111121 its reverse (121111122101), we get a palindrome (222332233222).

The spelling of 101221111121 in words is "one hundred one billion, two hundred twenty-one million, one hundred eleven thousand, one hundred twenty-one".