1012100978 has 48 divisors (see below), whose sum is σ = 1792627200. Its totient is φ = 427281120.

The previous prime is 1012100977. The next prime is 1012101011. The reversal of 1012100978 is 8790012101.

It is a super-3 number, since 3×1012100978³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1012100978.

It is not an unprimeable number, because it can be changed into a prime (1012100977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2601608 + ... + 2601996.

It is an arithmetic number, because the mean of its divisors is an integer number (37346400).

Almost surely, 2^1012100978 is an apocalyptic number.

1012100978 is a deficient number, since it is larger than the sum of its proper divisors (780526222).

1012100978 is a wasteful number, since it uses less digits than its factorization.

1012100978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 1012100978 is about 31813.5345097020. The cubic root of 1012100978 is about 1004.0174974332.

The spelling of 1012100978 in words is "one billion, twelve million, one hundred thousand, nine hundred seventy-eight".