1221012111022 has 24 divisors (see below), whose sum is σ = 2033088613416. Its totient is φ = 549510390000.

The previous prime is 1221012111017. The next prime is 1221012111031. The reversal of 1221012111022 is 2201112101221.

It is a super-3 number, since 3×1221012111022³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221012110987 and 1221012111005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24953304 + ... + 25002187.

It is an arithmetic number, because the mean of its divisors is an integer number (84712025559).

Almost surely, 2^{1221012111022} is an apocalyptic number.

1221012111022 is a deficient number, since it is larger than the sum of its proper divisors (812076502394).

1221012111022 is a wasteful number, since it uses less digits than its factorization.

1221012111022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49955616 (or 49955605 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1221012111022 its reverse (2201112101221), we get a palindrome (3422124212243).

The spelling of 1221012111022 in words is "one trillion, two hundred twenty-one billion, twelve million, one hundred eleven thousand, twenty-two".