21062121062 has 16 divisors (see below), whose sum is σ = 32969922912. Its totient is φ = 10072233600.

The previous prime is 21062121061. The next prime is 21062121161. The reversal of 21062121062 is 26012126012.

It is a happy number.

It is a super-2 number, since 2×21062121062² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21062121061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 819812 + ... + 845112.

It is an arithmetic number, because the mean of its divisors is an integer number (2060620182).

Almost surely, 2^21062121062 is an apocalyptic number.

21062121062 is a deficient number, since it is larger than the sum of its proper divisors (11907801850).

21062121062 is a wasteful number, since it uses less digits than its factorization.

21062121062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43423.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21062121062 its reverse (26012126012), we get a palindrome (47074247074).

The spelling of 21062121062 in words is "twenty-one billion, sixty-two million, one hundred twenty-one thousand, sixty-two".