21122112120010 has 128 divisors (see below), whose sum is σ = 45903430508544. Its totient is φ = 6902867727360.

The previous prime is 21122112120007. The next prime is 21122112120013. The reversal of 21122112120010 is 1002121122112.

It is an interprime number because it is at equal distance from previous prime (21122112120007) and next prime (21122112120013).

It is a super-2 number, since 2×21122112120010² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122112120013) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24828559 + ... + 25665181.

It is an arithmetic number, because the mean of its divisors is an integer number (358620550848).

Almost surely, 2^{21122112120010} is an apocalyptic number.

21122112120010 is an abundant number, since it is smaller than the sum of its proper divisors (24781318388534).

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

21122112120010 is a wasteful number, since it uses less digits than its factorization.

21122112120010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837268.

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

Adding to 21122112120010 its reverse (1002121122112), we get a palindrome (22124233242122).

The spelling of 21122112120010 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twelve million, one hundred twenty thousand, ten".