210121012112220 has 192 divisors, whose sum is σ = 723182178862080. Its totient is φ = 50220984441600.

The previous prime is 210121012112203. The next prime is 210121012112339. The reversal of 210121012112220 is 22211210121012.

210121012112220 is a `hidden beast` number, since 2 + 101 + 210 + 121 + 12 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 210121012112193 and 210121012112202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 248690287 + ... + 249533766.

It is an arithmetic number, because the mean of its divisors is an integer number (3766573848240).

Almost surely, 2^{210121012112220} is an apocalyptic number.

210121012112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210121012112220 is an abundant number, since it is smaller than the sum of its proper divisors (513061166749860).

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

210121012112220 is a wasteful number, since it uses less digits than its factorization.

210121012112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498224153 (or 498224145 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 210121012112220 its reverse (22211210121012), we get a palindrome (232332222233232).

The spelling of 210121012112220 in words is "two hundred ten trillion, one hundred twenty-one billion, twelve million, one hundred twelve thousand, two hundred twenty".