1201021222122 has 64 divisors (see below), whose sum is σ = 2684764684800. Its totient is φ = 397971947520.

The previous prime is 1201021222019. The next prime is 1201021222123. The reversal of 1201021222122 is 2212221201021.

It is a happy number.

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 = 1201021222095 and 1201021222104.

It is not an unprimeable number, because it can be changed into a prime (1201021222123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7366122 + ... + 7527402.

It is an arithmetic number, because the mean of its divisors is an integer number (41949448200).

Almost surely, 2^{1201021222122} is an apocalyptic number.

1201021222122 is an abundant number, since it is smaller than the sum of its proper divisors (1483743462678).

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

1201021222122 is a wasteful number, since it uses less digits than its factorization.

1201021222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162108 (or 162102 counting only the distinct ones).

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

Adding to 1201021222122 its reverse (2212221201021), we get a palindrome (3413242423143).

The spelling of 1201021222122 in words is "one trillion, two hundred one billion, twenty-one million, two hundred twenty-two thousand, one hundred twenty-two".