1222121019988 has 48 divisors (see below), whose sum is σ = 2474202858624. Its totient is φ = 522024227840.

The previous prime is 1222121019961. The next prime is 1222121019989. The reversal of 1222121019988 is 8899101212221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222121019989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 778681 + ... + 1746592.

It is an arithmetic number, because the mean of its divisors is an integer number (51545892888).

Almost surely, 2^{1222121019988} is an apocalyptic number.

It is an amenable number.

1222121019988 is an abundant number, since it is smaller than the sum of its proper divisors (1252081838636).

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

1222121019988 is a wasteful number, since it uses less digits than its factorization.

1222121019988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525952 (or 2525950 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 46.

The spelling of 1222121019988 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, nineteen thousand, nine hundred eighty-eight".