20212127 has 4 divisors (see below), whose sum is σ = 21766920. Its totient is φ = 18657336.

The previous prime is 20212117. The next prime is 20212151. The reversal of 20212127 is 72121202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20212127 - 2⁴ = 20212111 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212117) 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, 777377 + ... + 777402.

It is an arithmetic number, because the mean of its divisors is an integer number (5441730).

Almost surely, 2^20212127 is an apocalyptic number.

20212127 is a deficient number, since it is larger than the sum of its proper divisors (1554793).

20212127 is a wasteful number, since it uses less digits than its factorization.

20212127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554792.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 20212127 is about 4495.7899194691. The cubic root of 20212127 is about 272.3980574267.

Adding to 20212127 its reverse (72121202), we get a palindrome (92333329).

The spelling of 20212127 in words is "twenty million, two hundred twelve thousand, one hundred twenty-seven".