1221331012102 has 8 divisors (see below), whose sum is σ = 1836227458296. Its totient is φ = 609255192672.

The previous prime is 1221331012079. The next prime is 1221331012127. The reversal of 1221331012102 is 2012101331221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1221331012102² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221331012102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705155608 + ... + 705157339.

It is an arithmetic number, because the mean of its divisors is an integer number (229528432287).

Almost surely, 2^{1221331012102} is an apocalyptic number.

1221331012102 is a deficient number, since it is larger than the sum of its proper divisors (614896446194).

1221331012102 is a wasteful number, since it uses less digits than its factorization.

1221331012102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410313382.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1221331012102 its reverse (2012101331221), we get a palindrome (3233432343323).

The spelling of 1221331012102 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-one million, twelve thousand, one hundred two".