20010213121 has 8 divisors (see below), whose sum is σ = 20712121920. Its totient is φ = 19309097808.

The previous prime is 20010213107. The next prime is 20010213143. The reversal of 20010213121 is 12131201002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20010213121 - 2⁷ = 20010212993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20010213191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146821 + ... + 248146.

It is an arithmetic number, because the mean of its divisors is an integer number (2589015240).

Almost surely, 2^20010213121 is an apocalyptic number.

It is an amenable number.

20010213121 is a deficient number, since it is larger than the sum of its proper divisors (701908799).

20010213121 is a wasteful number, since it uses less digits than its factorization.

20010213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396743.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20010213121 its reverse (12131201002), we get a palindrome (32141414123).

The spelling of 20010213121 in words is "twenty billion, ten million, two hundred thirteen thousand, one hundred twenty-one".