1213025101 has 4 divisors (see below), whose sum is σ = 1213114752. Its totient is φ = 1212935452.

The previous prime is 1213025063. The next prime is 1213025111. The reversal of 1213025101 is 1015203121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1015203121 = 2111 ⋅480911.

It is a cyclic number.

It is not a de Polignac number, because 1213025101 - 2²⁹ = 676154189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213025111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19915 + ... + 53128.

It is an arithmetic number, because the mean of its divisors is an integer number (303278688).

Almost surely, 2^1213025101 is an apocalyptic number.

It is an amenable number.

1213025101 is a deficient number, since it is larger than the sum of its proper divisors (89651).

1213025101 is an equidigital number, since it uses as much as digits as its factorization.

1213025101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89650.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1213025101 is about 34828.5098877342. The cubic root of 1213025101 is about 1066.4895292548.

Adding to 1213025101 its reverse (1015203121), we get a palindrome (2228228222).

The spelling of 1213025101 in words is "one billion, two hundred thirteen million, twenty-five thousand, one hundred one".