1021150722157 has 4 divisors (see below), whose sum is σ = 1026792439036. Its totient is φ = 1015509005280.

The previous prime is 1021150722133. The next prime is 1021150722199. The reversal of 1021150722157 is 7512270511201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 497118064356 + 524032657801 = 705066^2 + 723901^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021150722157 - 2¹⁹ = 1021150197869 is a prime.

It is a super-2 number, since 2×1021150722157² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021150722857) 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, 2820858168 + ... + 2820858529.

It is an arithmetic number, because the mean of its divisors is an integer number (256698109759).

Almost surely, 2^{1021150722157} is an apocalyptic number.

It is an amenable number.

1021150722157 is a deficient number, since it is larger than the sum of its proper divisors (5641716879).

1021150722157 is an equidigital number, since it uses as much as digits as its factorization.

1021150722157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5641716878.

The product of its (nonzero) digits is 9800, while the sum is 34.

The spelling of 1021150722157 in words is "one trillion, twenty-one billion, one hundred fifty million, seven hundred twenty-two thousand, one hundred fifty-seven".