1215454541100 has 72 divisors (see below), whose sum is σ = 3527339944128. Its totient is φ = 323141966400.

The previous prime is 1215454541089. The next prime is 1215454541113. The reversal of 1215454541100 is 11454545121.

It is a super-2 number, since 2×1215454541100² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6020814 + ... + 6219413.

Almost surely, 2^{1215454541100} is an apocalyptic number.

1215454541100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215454541100 is an abundant number, since it is smaller than the sum of its proper divisors (2311885403028).

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

1215454541100 is a wasteful number, since it uses less digits than its factorization.

1215454541100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12240575 (or 12240568 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 33.

The spelling of 1215454541100 in words is "one trillion, two hundred fifteen billion, four hundred fifty-four million, five hundred forty-one thousand, one hundred".