1221230202112 has 36 divisors (see below), whose sum is σ = 2461356919840. Its totient is φ = 604686786048.

The previous prime is 1221230202109. The next prime is 1221230202113. The reversal of 1221230202112 is 2112020321221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221230202112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221230202113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23131062 + ... + 23183797.

Almost surely, 2^{1221230202112} is an apocalyptic number.

It is an amenable number.

1221230202112 is an abundant number, since it is smaller than the sum of its proper divisors (1240126717728).

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

1221230202112 is an equidigital number, since it uses as much as digits as its factorization.

1221230202112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46314978 (or 46314964 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1221230202112 its reverse (2112020321221), we get a palindrome (3333250523333).

The spelling of 1221230202112 in words is "one trillion, two hundred twenty-one billion, two hundred thirty million, two hundred two thousand, one hundred twelve".