21122001111020 has 24 divisors (see below), whose sum is σ = 44854586632800. Its totient is φ = 8353870101632.

The previous prime is 21122001111011. The next prime is 21122001111037. The reversal of 21122001111020 is 2011110022112.

It is a super-2 number, since 2×21122001111020² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122001110986 and 21122001111004.

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, 5933144600 + ... + 5933148159.

It is an arithmetic number, because the mean of its divisors is an integer number (1868941109700).

Almost surely, 2^{21122001111020} is an apocalyptic number.

21122001111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122001111020 is an abundant number, since it is smaller than the sum of its proper divisors (23732585521780).

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

21122001111020 is a wasteful number, since it uses less digits than its factorization.

21122001111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11866292857 (or 11866292855 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21122001111020 its reverse (2011110022112), we get a palindrome (23133111133132).

The spelling of 21122001111020 in words is "twenty-one trillion, one hundred twenty-two billion, one million, one hundred eleven thousand, twenty".