10621221810 has 64 divisors (see below), whose sum is σ = 25710455808. Its totient is φ = 2808022464.

The previous prime is 10621221803. The next prime is 10621221823. The reversal of 10621221810 is 1812212601.

It is a super-2 number, since 2×10621221810² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2163819 + ... + 2168721.

It is an arithmetic number, because the mean of its divisors is an integer number (401725872).

Almost surely, 2^10621221810 is an apocalyptic number.

10621221810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10621221810 is an abundant number, since it is smaller than the sum of its proper divisors (15089233998).

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

10621221810 is a wasteful number, since it uses less digits than its factorization.

10621221810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5519.

The product of its (nonzero) digits is 384, while the sum is 24.

The spelling of 10621221810 in words is "ten billion, six hundred twenty-one million, two hundred twenty-one thousand, eight hundred ten".