121222210020 has 48 divisors (see below), whose sum is σ = 341504560320. Its totient is φ = 32127601536.

The previous prime is 121222209991. The next prime is 121222210049. The reversal of 121222210020 is 20012222121.

It is an interprime number because it is at equal distance from previous prime (121222209991) and next prime (121222210049).

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 6187675 + ... + 6207234.

It is an arithmetic number, because the mean of its divisors is an integer number (7114678340).

Almost surely, 2^121222210020 is an apocalyptic number.

121222210020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121222210020 is an abundant number, since it is smaller than the sum of its proper divisors (220282350300).

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

121222210020 is a wasteful number, since it uses less digits than its factorization.

121222210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12395084 (or 12395082 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 121222210020 its reverse (20012222121), we get a palindrome (141234432141).

The spelling of 121222210020 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred ten thousand, twenty".