1223521113402 has 24 divisors (see below), whose sum is σ = 3029671328736. Its totient is φ = 349577460936.

The previous prime is 1223521113389. The next prime is 1223521113421. The reversal of 1223521113402 is 2043111253221.

It is a happy number.

1223521113402 is a `hidden beast` number, since 1 + 2 + 2 + 3 + 521 + 1 + 134 + 0 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4855242388 + ... + 4855242639.

It is an arithmetic number, because the mean of its divisors is an integer number (126236305364).

Almost surely, 2^{1223521113402} is an apocalyptic number.

1223521113402 is an abundant number, since it is smaller than the sum of its proper divisors (1806150215334).

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

1223521113402 is a wasteful number, since it uses less digits than its factorization.

1223521113402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9710485042 (or 9710485039 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 1223521113402 its reverse (2043111253221), we get a palindrome (3266632366623).

The spelling of 1223521113402 in words is "one trillion, two hundred twenty-three billion, five hundred twenty-one million, one hundred thirteen thousand, four hundred two".