1001210121010 has 24 divisors (see below), whose sum is σ = 1980906638508. Its totient is φ = 364076407200.

The previous prime is 1001210121007. The next prime is 1001210121011. The reversal of 1001210121010 is 101210121001.

It can be written as a sum of positive squares in 2 ways, for example, as 884726478801 + 116483642209 = 940599^2 + 341297^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1001210121011) 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, 413721981 + ... + 413724400.

Almost surely, 2^{1001210121010} is an apocalyptic number.

1001210121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1001210121010 is a deficient number, since it is larger than the sum of its proper divisors (979696517498).

1001210121010 is a wasteful number, since it uses less digits than its factorization.

1001210121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827446410 (or 827446399 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1001210121010 its reverse (101210121001), we get a palindrome (1102420242011).

Subtracting from 1001210121010 its reverse (101210121001), we obtain a palindrome (900000000009).

The spelling of 1001210121010 in words is "one trillion, one billion, two hundred ten million, one hundred twenty-one thousand, ten".