20120121112210 has 32 divisors (see below), whose sum is σ = 42725123546112. Its totient is φ = 6675800552640.

The previous prime is 20120121112183. The next prime is 20120121112237. The reversal of 20120121112210 is 1221112102102.

It is an interprime number because it is at equal distance from previous prime (20120121112183) and next prime (20120121112237).

It is a super-2 number, since 2×20120121112210² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4635970437 + ... + 4635974776.

It is an arithmetic number, because the mean of its divisors is an integer number (1335160110816).

Almost surely, 2^{20120121112210} is an apocalyptic number.

20120121112210 is an abundant number, since it is smaller than the sum of its proper divisors (22605002433902).

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

20120121112210 is a wasteful number, since it uses less digits than its factorization.

20120121112210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9271945258.

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

Adding to 20120121112210 its reverse (1221112102102), we get a palindrome (21341233214312).

The spelling of 20120121112210 in words is "twenty trillion, one hundred twenty billion, one hundred twenty-one million, one hundred twelve thousand, two hundred ten".