1221112001102 has 64 divisors (see below), whose sum is σ = 2205901209600. Its totient is φ = 496137489120.

The previous prime is 1221112001101. The next prime is 1221112001143. The reversal of 1221112001102 is 2011002111221.

It is a super-2 number, since 2×1221112001102² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221112001101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2588327 + ... + 3023517.

It is an arithmetic number, because the mean of its divisors is an integer number (34467206400).

Almost surely, 2^{1221112001102} is an apocalyptic number.

1221112001102 is a deficient number, since it is larger than the sum of its proper divisors (984789208498).

1221112001102 is a wasteful number, since it uses less digits than its factorization.

1221112001102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435381.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1221112001102 its reverse (2011002111221), we get a palindrome (3232114112323).

The spelling of 1221112001102 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, one thousand, one hundred two".