101012121100 has 36 divisors (see below), whose sum is σ = 239123242008. Its totient is φ = 36731680000.

The previous prime is 101012121083. The next prime is 101012121103. The reversal of 101012121100 is 1121210101.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (101012121103) 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, 45913501 + ... + 45915700.

It is an arithmetic number, because the mean of its divisors is an integer number (6642312278).

Almost surely, 2^101012121100 is an apocalyptic number.

101012121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101012121100 is an abundant number, since it is smaller than the sum of its proper divisors (138111120908).

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

101012121100 is a wasteful number, since it uses less digits than its factorization.

101012121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91829226 (or 91829219 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 101012121100 its reverse (1121210101), we get a palindrome (102133331201).

The spelling of 101012121100 in words is "one hundred one billion, twelve million, one hundred twenty-one thousand, one hundred".