1211220021230 has 32 divisors (see below), whose sum is σ = 2306475648000. Its totient is φ = 456682149792.

The previous prime is 1211220021157. The next prime is 1211220021251. The reversal of 1211220021230 is 321200221121.

It is a junction number, because it is equal to n+sod(n) for n = 1211220021199 and 1211220021208.

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, 15979382 + ... + 16055001.

It is an arithmetic number, because the mean of its divisors is an integer number (72077364000).

Almost surely, 2^{1211220021230} is an apocalyptic number.

1211220021230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211220021230 is a deficient number, since it is larger than the sum of its proper divisors (1095255626770).

1211220021230 is a wasteful number, since it uses less digits than its factorization.

1211220021230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32034608.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1211220021230 its reverse (321200221121), we get a palindrome (1532420242351).

The spelling of 1211220021230 in words is "one trillion, two hundred eleven billion, two hundred twenty million, twenty-one thousand, two hundred thirty".