1021477141551 has 4 divisors (see below), whose sum is σ = 1361969522072. Its totient is φ = 680984761032.

The previous prime is 1021477141537. The next prime is 1021477141591. The reversal of 1021477141551 is 1551417741201.

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

It is not a de Polignac number, because 1021477141551 - 2¹⁰ = 1021477140527 is a prime.

It is a super-2 number, since 2×1021477141551² (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 (1021477141591) 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, 170246190256 + ... + 170246190261.

It is an arithmetic number, because the mean of its divisors is an integer number (340492380518).

Almost surely, 2^{1021477141551} is an apocalyptic number.

1021477141551 is a deficient number, since it is larger than the sum of its proper divisors (340492380521).

1021477141551 is an equidigital number, since it uses as much as digits as its factorization.

1021477141551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340492380520.

The product of its (nonzero) digits is 39200, while the sum is 39.

The spelling of 1021477141551 in words is "one trillion, twenty-one billion, four hundred seventy-seven million, one hundred forty-one thousand, five hundred fifty-one".