121220121101210 has 48 divisors (see below), whose sum is σ = 219681552655080. Its totient is φ = 48160166476800.

The previous prime is 121220121101179. The next prime is 121220121101279. The reversal of 121220121101210 is 12101121022121.

It can be written as a sum of positive squares in 4 ways, for example, as 75038161276849 + 46181959824361 = 8662457^2 + 6795731^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 359320610 + ... + 359657810.

Almost surely, 2^{121220121101210} is an apocalyptic number.

121220121101210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121220121101210 is a deficient number, since it is larger than the sum of its proper divisors (98461431553870).

121220121101210 is a wasteful number, since it uses less digits than its factorization.

121220121101210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338831 (or 338664 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121220121101210 its reverse (12101121022121), we get a palindrome (133321242123331).

The spelling of 121220121101210 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred twenty-one million, one hundred one thousand, two hundred ten".