211121310030 has 32 divisors (see below), whose sum is σ = 536496506784. Its totient is φ = 52987309056.

The previous prime is 211121309983. The next prime is 211121310091. The reversal of 211121310030 is 30013121112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211121309991 and 211121310009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206981167 + ... + 206982186.

It is an arithmetic number, because the mean of its divisors is an integer number (16765515837).

Almost surely, 2^211121310030 is an apocalyptic number.

211121310030 is an abundant number, since it is smaller than the sum of its proper divisors (325375196754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211121310030 is a wasteful number, since it uses less digits than its factorization.

211121310030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413963380.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 211121310030 its reverse (30013121112), we get a palindrome (241134431142).

The spelling of 211121310030 in words is "two hundred eleven billion, one hundred twenty-one million, three hundred ten thousand, thirty".