2111632021 has 2 divisors, whose sum is σ = 2111632022. Its totient is φ = 2111632020.

The previous prime is 2111632009. The next prime is 2111632031. The reversal of 2111632021 is 1202361112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1858472100 + 253159921 = 43110^2 + 15911^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111632021 - 2¹⁵ = 2111599253 is a prime.

It is a super-2 number, since 2×2111632021² = 8917979584225088882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2111632021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111632031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055816010 + 1055816011.

It is an arithmetic number, because the mean of its divisors is an integer number (1055816011).

Almost surely, 2^2111632021 is an apocalyptic number.

It is an amenable number.

2111632021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111632021 is an equidigital number, since it uses as much as digits as its factorization.

2111632021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 2111632021 is about 45952.4974402915. The cubic root of 2111632021 is about 1282.9392134484.

Adding to 2111632021 its reverse (1202361112), we get a palindrome (3313993133).

The spelling of 2111632021 in words is "two billion, one hundred eleven million, six hundred thirty-two thousand, twenty-one".