2101202011221 has 4 divisors (see below), whose sum is σ = 2801602681632. Its totient is φ = 1400801340812.

The previous prime is 2101202011213. The next prime is 2101202011231. The reversal of 2101202011221 is 1221102021012.

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 2101202011221 - 2³ = 2101202011213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2101202011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101202011211) 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, 350200335201 + ... + 350200335206.

It is an arithmetic number, because the mean of its divisors is an integer number (700400670408).

Almost surely, 2^{2101202011221} is an apocalyptic number.

It is an amenable number.

2101202011221 is a deficient number, since it is larger than the sum of its proper divisors (700400670411).

2101202011221 is an equidigital number, since it uses as much as digits as its factorization.

2101202011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700400670410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2101202011221 its reverse (1221102021012), we get a palindrome (3322304032233).

The spelling of 2101202011221 in words is "two trillion, one hundred one billion, two hundred two million, eleven thousand, two hundred twenty-one".