121220111220988 has 12 divisors (see below), whose sum is σ = 228453286531960. Its totient is φ = 55947743640432.

The previous prime is 121220111220983. The next prime is 121220111221007. The reversal of 121220111220988 is 889022111022121.

It is a super-2 number, since 2×121220111220988² (a number of 29 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 121220111220988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220111220983) 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, 1165577992458 + ... + 1165577992561.

Almost surely, 2^{121220111220988} is an apocalyptic number.

It is an amenable number.

121220111220988 is a deficient number, since it is larger than the sum of its proper divisors (107233175310972).

121220111220988 is a wasteful number, since it uses less digits than its factorization.

121220111220988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2331155985036 (or 2331155985034 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 40.

The spelling of 121220111220988 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty thousand, nine hundred eighty-eight".