1001100212021 has 16 divisors (see below), whose sum is σ = 1245967430400. Its totient is φ = 783179515008.

The previous prime is 1001100212009. The next prime is 1001100212027. The reversal of 1001100212021 is 1202120011001.

It is a cyclic number.

It is not a de Polignac number, because 1001100212021 - 2²² = 1001096017717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001100211993 and 1001100212011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001100212027) 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, 61795841 + ... + 61812038.

It is an arithmetic number, because the mean of its divisors is an integer number (77872964400).

Almost surely, 2^{1001100212021} is an apocalyptic number.

It is an amenable number.

1001100212021 is a deficient number, since it is larger than the sum of its proper divisors (244867218379).

1001100212021 is a wasteful number, since it uses less digits than its factorization.

1001100212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123607988.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1001100212021 its reverse (1202120011001), we get a palindrome (2203220223022).

It can be divided in two parts, 1001100 and 212021, that added together give a palindrome (1213121).

The spelling of 1001100212021 in words is "one trillion, one billion, one hundred million, two hundred twelve thousand, twenty-one".