2121947528782 has 8 divisors (see below), whose sum is σ = 3235100330952. Its totient is φ = 1043580751800.

The previous prime is 2121947528759. The next prime is 2121947528801. The reversal of 2121947528782 is 2878257491212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2121947528782² (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 3 ways as a sum of consecutive naturals, for example, 8696506144 + ... + 8696506387.

It is an arithmetic number, because the mean of its divisors is an integer number (404387541369).

Almost surely, 2^{2121947528782} is an apocalyptic number.

2121947528782 is a deficient number, since it is larger than the sum of its proper divisors (1113152802170).

2121947528782 is a wasteful number, since it uses less digits than its factorization.

2121947528782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17393012594.

The product of its digits is 9031680, while the sum is 58.

The spelling of 2121947528782 in words is "two trillion, one hundred twenty-one billion, nine hundred forty-seven million, five hundred twenty-eight thousand, seven hundred eighty-two".