2900101221 has 12 divisors (see below), whose sum is σ = 4194148140. Its totient is φ = 1931040960.

The previous prime is 2900101219. The next prime is 2900101229. The reversal of 2900101221 is 1221010092.

It can be written as a sum of positive squares in 2 ways, for example, as 1280924100 + 1619177121 = 35790^2 + 40239^2 .

It is not a de Polignac number, because 2900101221 - 2¹ = 2900101219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2900101194 and 2900101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2900101229) 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, 188856 + ... + 203633.

It is an arithmetic number, because the mean of its divisors is an integer number (349512345).

Almost surely, 2^2900101221 is an apocalyptic number.

It is an amenable number.

2900101221 is a deficient number, since it is larger than the sum of its proper divisors (1294046919).

2900101221 is a wasteful number, since it uses less digits than its factorization.

2900101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393316 (or 393313 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 2900101221 is about 53852.5878765357. The cubic root of 2900101221 is about 1426.0597383877.

The spelling of 2900101221 in words is "two billion, nine hundred million, one hundred one thousand, two hundred twenty-one".