1000211212021 has 4 divisors (see below), whose sum is σ = 1143098528032. Its totient is φ = 857323896012.

The previous prime is 1000211212019. The next prime is 1000211212031. The reversal of 1000211212021 is 1202121120001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1000211212021 - 2¹ = 1000211212019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000211211992 and 1000211212010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000211212031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71443657995 + ... + 71443658008.

It is an arithmetic number, because the mean of its divisors is an integer number (285774632008).

Almost surely, 2^{1000211212021} is an apocalyptic number.

It is an amenable number.

1000211212021 is a deficient number, since it is larger than the sum of its proper divisors (142887316011).

1000211212021 is an equidigital number, since it uses as much as digits as its factorization.

1000211212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142887316010.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1000211212021 its reverse (1202121120001), we get a palindrome (2202332332022).

The spelling of 1000211212021 in words is "one trillion, two hundred eleven million, two hundred twelve thousand, twenty-one".