1221111102122 has 8 divisors (see below), whose sum is σ = 1831710891972. Its totient is φ = 610540804800.

The previous prime is 1221111102109. The next prime is 1221111102131. The reversal of 1221111102122 is 2212011111221.

It can be written as a sum of positive squares in 2 ways, for example, as 1192461816001 + 28649286121 = 1091999^2 + 169261^2 .

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

It is a super-2 number, since 2×1221111102122² (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 1221111102122.

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, 7269329 + ... + 7435412.

Almost surely, 2^{1221111102122} is an apocalyptic number.

1221111102122 is a deficient number, since it is larger than the sum of its proper divisors (610599789850).

1221111102122 is a wasteful number, since it uses less digits than its factorization.

1221111102122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14746264.

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

Adding to 1221111102122 its reverse (2212011111221), we get a palindrome (3433122213343).

Subtracting 1221111102122 from its reverse (2212011111221), we obtain a palindrome (990900009099).

The spelling of 1221111102122 in words is "one trillion, two hundred twenty-one billion, one hundred eleven million, one hundred two thousand, one hundred twenty-two".