121969783925 has 12 divisors (see below), whose sum is σ = 164991853536. Its totient is φ = 88705297200.

The previous prime is 121969783921. The next prime is 121969783981. The reversal of 121969783925 is 529387969121.

It is not a de Polignac number, because 121969783925 - 2² = 121969783921 is a prime.

It is a super-2 number, since 2×121969783925² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121969783921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221762969 + ... + 221763518.

It is an arithmetic number, because the mean of its divisors is an integer number (13749321128).

Almost surely, 2^121969783925 is an apocalyptic number.

It is an amenable number.

121969783925 is a deficient number, since it is larger than the sum of its proper divisors (43022069611).

121969783925 is a wasteful number, since it uses less digits than its factorization.

121969783925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443526508 (or 443526503 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 62.

The spelling of 121969783925 in words is "one hundred twenty-one billion, nine hundred sixty-nine million, seven hundred eighty-three thousand, nine hundred twenty-five".