210020112111021 has 8 divisors (see below), whose sum is σ = 280043260330080. Its totient is φ = 140005185982992.

The previous prime is 210020112111011. The next prime is 210020112111079. The reversal of 210020112111021 is 120111211020012.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-210020112111021 is a prime.

It is a super-2 number, since 2×210020112111021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210020112111011) 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, 2055463155 + ... + 2055565328.

It is an arithmetic number, because the mean of its divisors is an integer number (35005407541260).

Almost surely, 2^{210020112111021} is an apocalyptic number.

It is an amenable number.

210020112111021 is a deficient number, since it is larger than the sum of its proper divisors (70023148219059).

210020112111021 is a wasteful number, since it uses less digits than its factorization.

210020112111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4111045515.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 210020112111021 its reverse (120111211020012), we get a palindrome (330131323131033).

The spelling of 210020112111021 in words is "two hundred ten trillion, twenty billion, one hundred twelve million, one hundred eleven thousand, twenty-one".