20120210121100 has 36 divisors (see below), whose sum is σ = 43882484716224. Its totient is φ = 8007230822080.

The previous prime is 20120210121097. The next prime is 20120210121103. The reversal of 20120210121100 is 112101202102.

It is an interprime number because it is at equal distance from previous prime (20120210121097) and next prime (20120210121103).

It is not an unprimeable number, because it can be changed into a prime (20120210121103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 510645532 + ... + 510684931.

It is an arithmetic number, because the mean of its divisors is an integer number (1218957908784).

Almost surely, 2^{20120210121100} is an apocalyptic number.

20120210121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120210121100 is an abundant number, since it is smaller than the sum of its proper divisors (23762274595124).

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

20120210121100 is a wasteful number, since it uses less digits than its factorization.

20120210121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021330674 (or 1021330667 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20120210121100 its reverse (112101202102), we get a palindrome (20232311323202).

The spelling of 20120210121100 in words is "twenty trillion, one hundred twenty billion, two hundred ten million, one hundred twenty-one thousand, one hundred".