1221112112102 has 8 divisors (see below), whose sum is σ = 1831679594976. Its totient is φ = 610552247112.

The previous prime is 1221112112093. The next prime is 1221112112107. The reversal of 1221112112102 is 2012112111221.

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

It is a super-2 number, since 2×1221112112102² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221112112107) 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, 1485278 + ... + 2155985.

It is an arithmetic number, because the mean of its divisors is an integer number (228959949372).

Almost surely, 2^{1221112112102} is an apocalyptic number.

1221112112102 is a deficient number, since it is larger than the sum of its proper divisors (610567482874).

1221112112102 is a wasteful number, since it uses less digits than its factorization.

1221112112102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3808942.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1221112112102 its reverse (2012112111221), we get a palindrome (3233224223323).

The spelling of 1221112112102 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, one hundred twelve thousand, one hundred two".