20213121012010 has 64 divisors (see below), whose sum is σ = 37371260044800. Its totient is φ = 7868539840000.

The previous prime is 20213121011977. The next prime is 20213121012013. The reversal of 20213121012010 is 1021012131202.

It is a super-2 number, since 2×20213121012010² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20213121012013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 648859935 + ... + 648891085.

It is an arithmetic number, because the mean of its divisors is an integer number (583925938200).

Almost surely, 2^{20213121012010} is an apocalyptic number.

20213121012010 is a deficient number, since it is larger than the sum of its proper divisors (17158139032790).

20213121012010 is a wasteful number, since it uses less digits than its factorization.

20213121012010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42207.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20213121012010 its reverse (1021012131202), we get a palindrome (21234133143212).

The spelling of 20213121012010 in words is "twenty trillion, two hundred thirteen billion, one hundred twenty-one million, twelve thousand, ten".