2121156471982 has 16 divisors (see below), whose sum is σ = 3427170066432. Its totient is φ = 981741423960.

The previous prime is 2121156471977. The next prime is 2121156472003. The reversal of 2121156471982 is 2891746511212.

It is a super-2 number, since 2×2121156471982² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 743742078 + ... + 743744929.

It is an arithmetic number, because the mean of its divisors is an integer number (214198129152).

Almost surely, 2^{2121156471982} is an apocalyptic number.

2121156471982 is a deficient number, since it is larger than the sum of its proper divisors (1306013594450).

2121156471982 is a wasteful number, since it uses less digits than its factorization.

2121156471982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487487063.

The product of its digits is 483840, while the sum is 49.

The spelling of 2121156471982 in words is "two trillion, one hundred twenty-one billion, one hundred fifty-six million, four hundred seventy-one thousand, nine hundred eighty-two".