210121101220100 has 72 divisors (see below), whose sum is σ = 521103382665600. Its totient is φ = 72041098533120.

The previous prime is 210121101220099. The next prime is 210121101220171. The reversal of 210121101220100 is 1022101121012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133376801 + ... + 134942999.

Almost surely, 2^{210121101220100} is an apocalyptic number.

210121101220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210121101220100 is an abundant number, since it is smaller than the sum of its proper divisors (310982281445500).

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

210121101220100 is a wasteful number, since it uses less digits than its factorization.

210121101220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757877 (or 1757870 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 210121101220100 its reverse (1022101121012), we get a palindrome (211143202341112).

The spelling of 210121101220100 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred one million, two hundred twenty thousand, one hundred".