121400305156 has 24 divisors (see below), whose sum is σ = 236173301504. Its totient is φ = 54223460640.

The previous prime is 121400305153. The next prime is 121400305171. The reversal of 121400305156 is 651503004121.

It is not an unprimeable number, because it can be changed into a prime (121400305153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37653570 + ... + 37656793.

Almost surely, 2^121400305156 is an apocalyptic number.

It is an amenable number.

121400305156 is a deficient number, since it is larger than the sum of its proper divisors (114772996348).

121400305156 is a wasteful number, since it uses less digits than its factorization.

121400305156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75310411 (or 75310409 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 121400305156 its reverse (651503004121), we get a palindrome (772903309277).

The spelling of 121400305156 in words is "one hundred twenty-one billion, four hundred million, three hundred five thousand, one hundred fifty-six".