121012210156 has 6 divisors (see below), whose sum is σ = 211771367780. Its totient is φ = 60506105076.

The previous prime is 121012210141. The next prime is 121012210183. The reversal of 121012210156 is 651012210121.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15126526266 + ... + 15126526273.

Almost surely, 2^121012210156 is an apocalyptic number.

It is an amenable number.

121012210156 is a deficient number, since it is larger than the sum of its proper divisors (90759157624).

121012210156 is a wasteful number, since it uses less digits than its factorization.

121012210156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30253052543 (or 30253052541 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 22.

Adding to 121012210156 its reverse (651012210121), we get a palindrome (772024420277).

The spelling of 121012210156 in words is "one hundred twenty-one billion, twelve million, two hundred ten thousand, one hundred fifty-six".