21121211022010 has 32 divisors (see below), whose sum is σ = 41486718625344. Its totient is φ = 7678155072000.

The previous prime is 21121211021987. The next prime is 21121211022013. The reversal of 21121211022010 is 1022011212112.

It is a super-2 number, since 2×21121211022010² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21121211022013) 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, 28194856 + ... + 28934275.

It is an arithmetic number, because the mean of its divisors is an integer number (1296459957042).

Almost surely, 2^{21121211022010} is an apocalyptic number.

21121211022010 is a deficient number, since it is larger than the sum of its proper divisors (20365507603334).

21121211022010 is a wasteful number, since it uses less digits than its factorization.

21121211022010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57132510.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21121211022010 its reverse (1022011212112), we get a palindrome (22143222234122).

The spelling of 21121211022010 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred eleven million, twenty-two thousand, ten".