121640525231442 has 48 divisors (see below), whose sum is σ = 293439114326592. Its totient is φ = 32925254945760.

The previous prime is 121640525231369. The next prime is 121640525231453. The reversal of 121640525231442 is 244132525046121.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 121640525231394 and 121640525231403.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4011346309 + ... + 4011376632.

It is an arithmetic number, because the mean of its divisors is an integer number (6113314881804).

Almost surely, 2^{121640525231442} is an apocalyptic number.

121640525231442 is an abundant number, since it is smaller than the sum of its proper divisors (171798589095150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121640525231442 is a wasteful number, since it uses less digits than its factorization.

121640525231442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8022722991 (or 8022722972 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 42.

The spelling of 121640525231442 in words is "one hundred twenty-one trillion, six hundred forty billion, five hundred twenty-five million, two hundred thirty-one thousand, four hundred forty-two".