1021131002001 has 32 divisors (see below), whose sum is σ = 1553206874112. Its totient is φ = 590681266560.

The previous prime is 1021131001999. The next prime is 1021131002009. The reversal of 1021131002001 is 1002001311201.

It is not a de Polignac number, because 1021131002001 - 2¹ = 1021131001999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021131002009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1101460 + ... + 1804293.

It is an arithmetic number, because the mean of its divisors is an integer number (48537714816).

Almost surely, 2^{1021131002001} is an apocalyptic number.

1021131002001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021131002001 is a deficient number, since it is larger than the sum of its proper divisors (532075872111).

1021131002001 is a wasteful number, since it uses less digits than its factorization.

1021131002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906253.

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

Adding to 1021131002001 its reverse (1002001311201), we get a palindrome (2023132313202).

The spelling of 1021131002001 in words is "one trillion, twenty-one billion, one hundred thirty-one million, two thousand, one".