1021641131 has 12 divisors (see below), whose sum is σ = 1195740072. Its totient is φ = 870313248.

The previous prime is 1021641119. The next prime is 1021641133. The reversal of 1021641131 is 1311461201.

It is a happy number.

1021641131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1021641131 - 2¹⁸ = 1021378987 is a prime.

It is a super-2 number, since 2×1021641131² = 2087501201101918322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021641133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55970 + ... + 71943.

It is an arithmetic number, because the mean of its divisors is an integer number (99645006).

Almost surely, 2^1021641131 is an apocalyptic number.

1021641131 is a deficient number, since it is larger than the sum of its proper divisors (174098941).

1021641131 is a wasteful number, since it uses less digits than its factorization.

1021641131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128090 (or 128083 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1021641131 is about 31963.1214214131. The cubic root of 1021641131 is about 1007.1622894716.

The spelling of 1021641131 in words is "one billion, twenty-one million, six hundred forty-one thousand, one hundred thirty-one".