1021537121003 has 12 divisors (see below), whose sum is σ = 1188511546320. Its totient is φ = 875461143312.

The previous prime is 1021537120999. The next prime is 1021537121063. The reversal of 1021537121003 is 3001217351201.

It is not a de Polignac number, because 1021537121003 - 2² = 1021537120999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021537121063) 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, 1386143 + ... + 1991096.

It is an arithmetic number, because the mean of its divisors is an integer number (99042628860).

Almost surely, 2^{1021537121003} is an apocalyptic number.

1021537121003 is a deficient number, since it is larger than the sum of its proper divisors (166974425317).

1021537121003 is an equidigital number, since it uses as much as digits as its factorization.

1021537121003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3383426 (or 3383419 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The spelling of 1021537121003 in words is "one trillion, twenty-one billion, five hundred thirty-seven million, one hundred twenty-one thousand, three".