2156102121652 has 6 divisors (see below), whose sum is σ = 3773178712898. Its totient is φ = 1078051060824.

The previous prime is 2156102121631. The next prime is 2156102121697. The reversal of 2156102121652 is 2561212016512.

It can be written as a sum of positive squares in only one way, i.e., 2043653230096 + 112448891556 = 1429564^2 + 335334^2 .

It is a super-4 number, since 4×2156102121652⁴ (a number of 50 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269512765203 + ... + 269512765210.

Almost surely, 2^{2156102121652} is an apocalyptic number.

It is an amenable number.

2156102121652 is a deficient number, since it is larger than the sum of its proper divisors (1617076591246).

2156102121652 is a wasteful number, since it uses less digits than its factorization.

2156102121652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539025530417 (or 539025530415 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 2156102121652 in words is "two trillion, one hundred fifty-six billion, one hundred two million, one hundred twenty-one thousand, six hundred fifty-two".