121031111385506 has 16 divisors (see below), whose sum is σ = 218402005508160. Its totient is φ = 49140451239120.

The previous prime is 121031111385479. The next prime is 121031111385539. The reversal of 121031111385506 is 605583111130121.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 121031111385506.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227502088805 + ... + 227502089336.

It is an arithmetic number, because the mean of its divisors is an integer number (13650125344260).

Almost surely, 2^{121031111385506} is an apocalyptic number.

121031111385506 is a deficient number, since it is larger than the sum of its proper divisors (97370894122654).

121031111385506 is a wasteful number, since it uses less digits than its factorization.

121031111385506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455004178169.

The product of its (nonzero) digits is 21600, while the sum is 38.

The spelling of 121031111385506 in words is "one hundred twenty-one trillion, thirty-one billion, one hundred eleven million, three hundred eighty-five thousand, five hundred six".