1297295942121 has 9 divisors (see below), whose sum is σ = 1873876852029. Its totient is φ = 864861683436.

The previous prime is 1297295942113. The next prime is 1297295942123. The reversal of 1297295942121 is 1212495927921.

The square root of 1297295942121 is 1138989.

It is a perfect power (a square), and thus also a powerful number.

1297295942121 is a `hidden beast` number, since 1 + 2 + 9 + 7 + 2 + 9 + 594 + 21 + 21 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1297295942121 - 2³ = 1297295942113 is a prime.

It is a super-2 number, since 2×1297295942121² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1297295942123) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3227136 + ... + 3606798.

Almost surely, 2^{1297295942121} is an apocalyptic number.

1297295942121 is the 1138989-th square number.

1297295942121 is the 569495-th centered octagonal number.

It is an amenable number.

1297295942121 is a deficient number, since it is larger than the sum of its proper divisors (576580909908).

1297295942121 is an frugal number, since it uses more digits than its factorization.

1297295942121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759332 (or 379666 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The spelling of 1297295942121 in words is "one trillion, two hundred ninety-seven billion, two hundred ninety-five million, nine hundred forty-two thousand, one hundred twenty-one".