101121111021 has 16 divisors (see below), whose sum is σ = 154165771904. Its totient is φ = 57754819584.

The previous prime is 101121110947. The next prime is 101121111029. The reversal of 101121111021 is 120111121101.

It is not a de Polignac number, because 101121111021 - 2¹⁰ = 101121109997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101121110988 and 101121111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101121111029) 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, 1151320 + ... + 1236033.

It is an arithmetic number, because the mean of its divisors is an integer number (9635360744).

Almost surely, 2^101121111021 is an apocalyptic number.

It is an amenable number.

101121111021 is a deficient number, since it is larger than the sum of its proper divisors (53044660883).

101121111021 is a wasteful number, since it uses less digits than its factorization.

101121111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2389380.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 101121111021 its reverse (120111121101), we get a palindrome (221232232122).

The spelling of 101121111021 in words is "one hundred one billion, one hundred twenty-one million, one hundred eleven thousand, twenty-one".