21021101020122 has 64 divisors (see below), whose sum is σ = 49710727987200. Its totient is φ = 5798263907520.

The previous prime is 21021101020099. The next prime is 21021101020123. The reversal of 21021101020122 is 22102010112012.

It is not an unprimeable number, because it can be changed into a prime (21021101020123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9763047 + ... + 11720037.

It is an arithmetic number, because the mean of its divisors is an integer number (776730124800).

Almost surely, 2^{21021101020122} is an apocalyptic number.

21021101020122 is an abundant number, since it is smaller than the sum of its proper divisors (28689626967078).

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

21021101020122 is a wasteful number, since it uses less digits than its factorization.

21021101020122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965851.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21021101020122 its reverse (22102010112012), we get a palindrome (43123111132134).

The spelling of 21021101020122 in words is "twenty-one trillion, twenty-one billion, one hundred one million, twenty thousand, one hundred twenty-two".