21201001122 has 32 divisors (see below), whose sum is σ = 50022641664. Its totient is φ = 5862027600.

The previous prime is 21201001109. The next prime is 21201001141. The reversal of 21201001122 is 22110010212.

It is a junction number, because it is equal to n+sod(n) for n = 21201001098 and 21201001107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8140404 + ... + 8143007.

It is an arithmetic number, because the mean of its divisors is an integer number (1563207552).

Almost surely, 2^21201001122 is an apocalyptic number.

21201001122 is an abundant number, since it is smaller than the sum of its proper divisors (28821640542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21201001122 is a wasteful number, since it uses less digits than its factorization.

21201001122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16283454.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21201001122 its reverse (22110010212), we get a palindrome (43311011334).

The spelling of 21201001122 in words is "twenty-one billion, two hundred one million, one thousand, one hundred twenty-two".