1221112442402 has 32 divisors (see below), whose sum is σ = 1869474950784. Its totient is φ = 598086720000.

The previous prime is 1221112442401. The next prime is 1221112442447. The reversal of 1221112442402 is 2042442111221.

It is a super-2 number, since 2×1221112442402² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221112442401) 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, 75448403 + ... + 75464585.

It is an arithmetic number, because the mean of its divisors is an integer number (58421092212).

Almost surely, 2^{1221112442402} is an apocalyptic number.

1221112442402 is a deficient number, since it is larger than the sum of its proper divisors (648362508382).

1221112442402 is a wasteful number, since it uses less digits than its factorization.

1221112442402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20234.

The product of its (nonzero) digits is 2048, while the sum is 26.

Adding to 1221112442402 its reverse (2042442111221), we get a palindrome (3263554553623).

The spelling of 1221112442402 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, four hundred forty-two thousand, four hundred two".