101221110021 has 16 divisors (see below), whose sum is σ = 141016965120. Its totient is φ = 64460814000.

The previous prime is 101221109953. The next prime is 101221110037. The reversal of 101221110021 is 120011122101.

It is not a de Polignac number, because 101221110021 - 2¹⁴ = 101221093637 is a prime.

It is a super-2 number, since 2×101221110021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 101221109979 and 101221110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221110091) 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, 924861 + ... + 1028498.

It is an arithmetic number, because the mean of its divisors is an integer number (8813560320).

Almost surely, 2^101221110021 is an apocalyptic number.

It is an amenable number.

101221110021 is a deficient number, since it is larger than the sum of its proper divisors (39795855099).

101221110021 is a wasteful number, since it uses less digits than its factorization.

101221110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954136.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 101221110021 its reverse (120011122101), we get a palindrome (221232232122).

The spelling of 101221110021 in words is "one hundred one billion, two hundred twenty-one million, one hundred ten thousand, twenty-one".