21021011214 has 32 divisors (see below), whose sum is σ = 48129935616. Its totient is φ = 5995764480.

The previous prime is 21021011213. The next prime is 21021011239. The reversal of 21021011214 is 41211012012.

It is a super-2 number, since 2×21021011214² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21021011193 and 21021011202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021011213) 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, 401667 + ... + 450974.

It is an arithmetic number, because the mean of its divisors is an integer number (1504060488).

Almost surely, 2^21021011214 is an apocalyptic number.

21021011214 is an abundant number, since it is smaller than the sum of its proper divisors (27108924402).

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

21021011214 is a wasteful number, since it uses less digits than its factorization.

21021011214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853240.

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

Adding to 21021011214 its reverse (41211012012), we get a palindrome (62232023226).

The spelling of 21021011214 in words is "twenty-one billion, twenty-one million, eleven thousand, two hundred fourteen".