1211001020210 has 64 divisors (see below), whose sum is σ = 2414266041600. Its totient is φ = 435017459712.

The previous prime is 1211001020167. The next prime is 1211001020237. The reversal of 1211001020210 is 120201001121.

It is a junction number, because it is equal to n+sod(n) for n = 1211001020191 and 1211001020200.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1220561 + ... + 1977819.

It is an arithmetic number, because the mean of its divisors is an integer number (37722906900).

Almost surely, 2^{1211001020210} is an apocalyptic number.

1211001020210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211001020210 is a deficient number, since it is larger than the sum of its proper divisors (1203265021390).

1211001020210 is a wasteful number, since it uses less digits than its factorization.

1211001020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757715.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1211001020210 its reverse (120201001121), we get a palindrome (1331202021331).

The spelling of 1211001020210 in words is "one trillion, two hundred eleven billion, one million, twenty thousand, two hundred ten".