1235445213121 has 32 divisors (see below), whose sum is σ = 1474364989440. Its totient is φ = 1012931568000.

The previous prime is 1235445213109. The next prime is 1235445213137. The reversal of 1235445213121 is 1213125445321.

It is a cyclic number.

It is not a de Polignac number, because 1235445213121 - 2⁵ = 1235445213089 is a prime.

It is a super-2 number, since 2×1235445213121² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1235445213151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66948946 + ... + 66967396.

It is an arithmetic number, because the mean of its divisors is an integer number (46073905920).

Almost surely, 2^{1235445213121} is an apocalyptic number.

It is an amenable number.

1235445213121 is a deficient number, since it is larger than the sum of its proper divisors (238919776319).

1235445213121 is a wasteful number, since it uses less digits than its factorization.

1235445213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22045.

The product of its digits is 28800, while the sum is 34.

The spelling of 1235445213121 in words is "one trillion, two hundred thirty-five billion, four hundred forty-five million, two hundred thirteen thousand, one hundred twenty-one".