1221513052029 has 16 divisors (see below), whose sum is σ = 1671250432320. Its totient is φ = 793126528640.

The previous prime is 1221513052021. The next prime is 1221513052033. The reversal of 1221513052029 is 9202503151221.

It is a cyclic number.

It is not a de Polignac number, because 1221513052029 - 2³ = 1221513052021 is a prime.

It is a super-2 number, since 2×1221513052029² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221513052021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8386914 + ... + 8531315.

It is an arithmetic number, because the mean of its divisors is an integer number (104453152020).

Almost surely, 2^{1221513052029} is an apocalyptic number.

It is an amenable number.

1221513052029 is a deficient number, since it is larger than the sum of its proper divisors (449737380291).

1221513052029 is a wasteful number, since it uses less digits than its factorization.

1221513052029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16918860.

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 1221513052029 in words is "one trillion, two hundred twenty-one billion, five hundred thirteen million, fifty-two thousand, twenty-nine".