1021220122122 has 16 divisors (see below), whose sum is σ = 2269378049280. Its totient is φ = 340406707356.

The previous prime is 1021220122121. The next prime is 1021220122133. The reversal of 1021220122122 is 2212210221201.

It is a happy number.

1021220122122 is a `hidden beast` number, since 10 + 212 + 201 + 221 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1021220122095 and 1021220122104.

It is not an unprimeable number, because it can be changed into a prime (1021220122121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9455741818 + ... + 9455741925.

It is an arithmetic number, because the mean of its divisors is an integer number (141836128080).

Almost surely, 2^{1021220122122} is an apocalyptic number.

1021220122122 is an abundant number, since it is smaller than the sum of its proper divisors (1248157927158).

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

1021220122122 is a wasteful number, since it uses less digits than its factorization.

1021220122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18911483754 (or 18911483748 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1021220122122 its reverse (2212210221201), we get a palindrome (3233430343323).

The spelling of 1021220122122 in words is "one trillion, twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred twenty-two".