1221112202102 has 32 divisors (see below), whose sum is σ = 2063621327040. Its totient is φ = 537700394880.

The previous prime is 1221112202087. The next prime is 1221112202117. The reversal of 1221112202102 is 2012022111221.

It is an interprime number because it is at equal distance from previous prime (1221112202087) and next prime (1221112202117).

It is a super-2 number, since 2×1221112202102² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2392049 + ... + 2857292.

It is an arithmetic number, because the mean of its divisors is an integer number (64488166470).

Almost surely, 2^{1221112202102} is an apocalyptic number.

1221112202102 is a deficient number, since it is larger than the sum of its proper divisors (842509124938).

1221112202102 is a wasteful number, since it uses less digits than its factorization.

1221112202102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5249768.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1221112202102 its reverse (2012022111221), we get a palindrome (3233134313323).

The spelling of 1221112202102 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, two hundred two thousand, one hundred two".