1001021020131 has 16 divisors (see below), whose sum is σ = 1532663763840. Its totient is φ = 574748910720.

The previous prime is 1001021020117. The next prime is 1001021020133. The reversal of 1001021020131 is 1310201201001.

It is not a de Polignac number, because 1001021020131 - 2⁵ = 1001021020099 is a prime.

It is a super-2 number, since 2×1001021020131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1001021020133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 798261750 + ... + 798263003.

It is an arithmetic number, because the mean of its divisors is an integer number (95791485240).

Almost surely, 2^{1001021020131} is an apocalyptic number.

1001021020131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1001021020131 is a deficient number, since it is larger than the sum of its proper divisors (531642743709).

1001021020131 is a wasteful number, since it uses less digits than its factorization.

1001021020131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596524786.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 1001021020131 its reverse (1310201201001), we get a palindrome (2311222221132).

The spelling of 1001021020131 in words is "one trillion, one billion, twenty-one million, twenty thousand, one hundred thirty-one".