1211212121102 has 8 divisors (see below), whose sum is σ = 1828390272456. Its totient is φ = 601748696952.

The previous prime is 1211212121039. The next prime is 1211212121131. The reversal of 1211212121102 is 2011212121121.

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

It is a super-4 number, since 4×1211212121102⁴ (a number of 49 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1928681408 + ... + 1928682035.

It is an arithmetic number, because the mean of its divisors is an integer number (228548784057).

Almost surely, 2^{1211212121102} is an apocalyptic number.

1211212121102 is a deficient number, since it is larger than the sum of its proper divisors (617178151354).

1211212121102 is a wasteful number, since it uses less digits than its factorization.

1211212121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3857363602.

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

Adding to 1211212121102 its reverse (2011212121121), we get a palindrome (3222424242223).

The spelling of 1211212121102 in words is "one trillion, two hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred two".