21001120022010 has 64 divisors (see below), whose sum is σ = 53076624226560. Its totient is φ = 5307662384640.

The previous prime is 21001120022009. The next prime is 21001120022053. The reversal of 21001120022010 is 1022002110012.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139541331 + ... + 139691750.

It is an arithmetic number, because the mean of its divisors is an integer number (829322253540).

Almost surely, 2^{21001120022010} is an apocalyptic number.

21001120022010 is an abundant number, since it is smaller than the sum of its proper divisors (32075504204550).

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

21001120022010 is a wasteful number, since it uses less digits than its factorization.

21001120022010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279233223.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21001120022010 its reverse (1022002110012), we get a palindrome (22023122132022).

The spelling of 21001120022010 in words is "twenty-one trillion, one billion, one hundred twenty million, twenty-two thousand, ten".