21021210011002 has 16 divisors (see below), whose sum is σ = 32941126616832. Its totient is φ = 10049004394560.

The previous prime is 21021210010907. The next prime is 21021210011003. The reversal of 21021210011002 is 20011001212012.

It is a super-2 number, since 2×21021210011002² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21021210011003) 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, 2042475423 + ... + 2042485714.

It is an arithmetic number, because the mean of its divisors is an integer number (2058820413552).

Almost surely, 2^{21021210011002} is an apocalyptic number.

21021210011002 is a deficient number, since it is larger than the sum of its proper divisors (11919916605830).

21021210011002 is a wasteful number, since it uses less digits than its factorization.

21021210011002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4084961253.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21021210011002 its reverse (20011001212012), we get a palindrome (41032211223014).

The spelling of 21021210011002 in words is "twenty-one trillion, twenty-one billion, two hundred ten million, eleven thousand, two".