1213253511000 has 128 divisors (see below), whose sum is σ = 3822830631360. Its totient is φ = 320330880000.

The previous prime is 1213253510977. The next prime is 1213253511011. The reversal of 1213253511000 is 1153523121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1699069 + ... + 2305068.

Almost surely, 2^{1213253511000} is an apocalyptic number.

1213253511000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213253511000 is an abundant number, since it is smaller than the sum of its proper divisors (2609577120360).

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

1213253511000 is a wasteful number, since it uses less digits than its factorization.

1213253511000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004262 (or 4004248 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The spelling of 1213253511000 in words is "one trillion, two hundred thirteen billion, two hundred fifty-three million, five hundred eleven thousand".