634121310000 has 100 divisors (see below), whose sum is σ = 2047028235032. Its totient is φ = 169099008000.

The previous prime is 634121309957. The next prime is 634121310013. The reversal of 634121310000 is 13121436.

It is a tau number, because it is divible by the number of its divisors (100).

It is a super-2 number, since 2×634121310000² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10538689 + ... + 10598688.

Almost surely, 2^634121310000 is an apocalyptic number.

634121310000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

634121310000 is an abundant number, since it is smaller than the sum of its proper divisors (1412906925032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

634121310000 is a wasteful number, since it uses less digits than its factorization.

634121310000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21137408 (or 21137387 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 634121310000 its reverse (13121436), we get a palindrome (634134431436).

The spelling of 634121310000 in words is "six hundred thirty-four billion, one hundred twenty-one million, three hundred ten thousand".